Seaming mechanism



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SEAMING MEGHANISM Filed Dec. 23, 1943 5 Sheets-Sheet 5 j @im IN V EN TOR. l Mug www BY may( Patented Dec. 25, 1945 SEAMING MECHANIsM 'WillyDiezeL 'Fairleld, Conn., assigner to The Max Ams Machine Company,

Bridgeport,

Conn., a corporation of Connecticut Application December 23, 1943, .Serial No. 515,401

1 Claim,

The present invention relates to ,Seaming ma entries, whether of the type that merely cran-ps or vcurls sheet material parts, or of the type that performs a double-seeming operation.

The main .object of .the invention is to Vprovide a sea-mins mechanism of simple construction that will unite heavy gauge sheet material members without throwing an undue load on the actuating parts of the device.

igs. l to inclusive show one form of the invention as applied to a crimping machine;

Fig. l is a fragmentary view in side elevation .oi so much of a crimping machine as is necessary to `an understanding of the invention;

Fig. 2 is a horizontal sectional View substantialiv o n the plane of line .2-2 .of Fig. 1;

Fig. .3 a vertical sectional view ,substantially on the plane .of lline 3-3 Vof Fig. 2;

Fig. i is a horizontal sectional view .substan-A tialfliy H the plane .of line 4-4 of Fig, 3;

Fig. 5 is a vertical sectional View substantially on the piane of `line 5-.5 vof Fig, .3;

Figs. .6 to 14 inclusive .show another form of the invention as applied to a double seaming machine;

Fig. .6 is a `fragmentary view in side elevation o-f so much of a double seaming machine as -is necessary to an understanding .of the invention;

Fig. 7 is a horizontal sectional view substantially .on the plane of line "l--T of 'Fig'. 6;

Fig. :8 is a vertical sectional View substantially on the piane of line B-.-.8 of Fig, 9; showing the details associated with the first-operation `seaming rollers;

Fig. 9 is a vertical sectional view substantially on the piane of line 9l=9 of Fig. 8;

Fig. 1.0 is a horizontal sectional view substantially .on the plane of line Ici-,lil of Fig. 8;

Fig. l1 is a horizontal sectional view substantially on the plane of line lisll of Fig. .8;

Fig. l2 is a vertical sectional View substantially on the plane of line 42:42 of Fig. lf3, showing the .details associated with the second-.operation seaming rollers;

Fig. 13 is a vertical sectional View substantially on the plane of line 'I3-I3 of Fig. 14; and

Fig. '14 is a horizontal sectional view substantially on the plane of line ill-I4 of Fig. '12.

Attention is first directed to that form of the invention which is disclosed in Figs. l to 5 inclusive, which figures show that `form of seaming mechanism commonly referred to as a crimping mechanism y In the present instance, the workpiece (Fig. 3) is a container l5 to which a container-end 1.6 has been double-seamed and to which it is` desired to attach an extra cover l-'l by means of a crimping or curling operation, and the mechanism disclosed has for its pur-posethe crimping of this extra cover, Il, to parts .I5 and H5 that have been previously united. v

i8 is ya supporting member provided ,witha seamer head I9 carrying the crimping rollersto be presently described. In accordance with Wellunderstood practice, either the work-piece or the seamer head may rotate but, in the present instance, the work-piece stands still and the sup porting member `and lseamer head rotate. Accordingly, 2D is a non-rotating shaftl to which chuck 2l is attached, whereas supporting member I8, and'thereby eeamer head 1.9, is rotated by gear 22. s y

`The vseeming rollers, here in .the form of crimping rollers 2.3,. may vary in number but, in the present instance, it is preferred to y.employ three such rollers with means for simultaneously moving them toward and away from the work-piece. As indicated particularly in Fig. 2, the means V`for 'effecting this in-and-out movement of the three crimping rollers are alike, and it will therefore only be necessary to describe one of these moans. 24 is a seaming-roller carrier mounted to slide substantially radially in the seamer head, and 25 is a subsidiary carrier, on which roller 23 is rotatably mounted, said subsidiary carrier 25 .being slidably v.adjustable on 24 by means of threaded stem 26 mounted to rotate, but not to move endwise, in bridge-portion 21 of 24. kI t will be understood that rotation of stem 26 in bridge-portion 21 will cause an adjustment of subsidiary carrier 25 in one direction or the other, depending upon the direction of rotation of stem 2B, A28 and 29 indicate two complementary fulcra.members, one, 28, being Apivotally supported in bearings 3B on seamer head I9, and, the other, 29, being pivotally .supported in suitable bearings k3| on seaming-roller carrier 2li. 32 and 33Vdenote toggle-links -that are pivotally connected at 34 and which are interposed `"between said ful'cra-members. YIt will be seen that, when said toggle-links are straightened, seaming-roller carrier 24 will be moved toward the work-piece and that, when said toggle-links are flexed, seaming-roller carrier 24 will be moved away from the work-piece. 35 is a slee-ve mounted to slide lengthwise of, and to rotate with, supporting member i8, as by means .of one or more .keys 36. Suitable connecting means are provided to straighten and flex said toggleelinks in response to the sliding movement of sleeve 3,5. ,In the present instance, 31 indicates an arm rigidly connected to toggle-link 33, and it will be seen that 31 and 33 constitute, in effect, an elbow or bellcrank; and 38 is a link pivotally supported at 39 on said sleeve 35 and pivotally connected at 40 to said arm 31. It will now be apparent (Fig. 3) that an upward movement of sleeve 35 will straighten the toggle-links and that a downward movement will flex them. 4| is a cam shaft making one revolution to a plurality of revolutions, such as four, of sleeve 35. Mounted to rotate with said cam shaft, 4|, is a cam 42. Pivotally mounted at 43 in the framework is a cam lever 44 having a cam roll 45 to engage said cam, and, connected to said cam lever, is a bifurcated lever 46 having rollers 41 (only one of which is shown) to engage grooved collar 48 of sleeve 35 to raise and lower the latter in response to rotation of cam 42 during each revolution of said cam.

It will be seen from the foregoing that, when seaming or crimping roller 23 begins to act on the work-piece, toggle-links 32 and 33 are approaching their straightened position and that,

at the moment or greatest strain, the togglelinks are straightened. This means that, as the seaming or crimping pressure is increased, the operating pressure at cam 42 and on collar 48 is at its lowest. It will further be seen that the construction of the mechanism is extremely simple and, also, thatv the necessity fr differential gearing is avoided, in that a simple train of gears as 49 can be employed to transmit motion both to supporting member I8 and cam shaft 4|.

Attention is now directed to Figs. 6 to 14 which disclose seaming mechanism of the doubleseaming type. In this form of the invention, supporting member 50 and seamer head 5| rotate and shaft 52 and chuck 53 are non-rotatable.

Seamer head is provided with two first-oper-` ation seaming-roller carriers, one of which is shown in detail in Figs. 8 to l1, and two secondoperation seaming-roller carriers, one of which is shown in detail in Figs. 12 to 14. The assembly of both seaming-roller carriers is shown in Figs. 6 and 7. As all the seaming-roller carriers, and the elements associated therewith, are substan- .tially alike, one general description will sufce for all, and any dierences that exist will be subsequently pointed out.

Reference character 54 indicates a seamingroller carrier mounted to slide substantially radially in the seamer head. 55 is a subsidiary carrier, on which, as the case may be, a first- ,operation seaming roller 56 or a second-operation seaming roller 56a is rotatably mounted.

.Subsidiary carrier 55 is slidably adjustable on 54 by means of threaded stem 51 mounted to rotate, but not to move endwise, in bridge-portion 58 of 54. It will be understood that rotation of stem 5Tin bridge-portion 58 will cause an adjustment of subsidiary carrier 55 in one direction or the other, depending upon direction of rotation of stem 51. 59 and 66 indicate twocomplementary fulcra-members, one, 59, being pivotally supported in bearings 6| of the seamer head, and, the other, 60, being pivotally supported in suitable bearings 62 on seaming-roller carrier 54. 63

and 64 denote toggle-links that are pivotally connected at 65 and which are interposed between said fulcra-members. It will be seen that, when said toggle-links are straightened, seaming-roller carrier 54 will be moved toward the work-piece, and that,` when said,

a cam shaft making one revolution to a plurality of revolutions, eight for instance, of supporting member 50. 1 |v and 12 indicate two cams mounted to rotate with shaft 10. Pivotally supported on the framework at 13 and 14 are two cam levers 15 and 16, each of which carries a cam roller 11 or-18 to engage cams 1| and 12 respectively. Cam lever 15 carries a bifurcated portion 19 to engage collar or grooved member 86 of sleeve 66, and cam lever 16 similarly carries a bifurcated portion 8| to engage collar or grooved member 82. Cams 1| and 12, during each revolution of shaft 19, effect a sliding movement in opposite directions of sleeves 66 and 61 and, owing to the timing of said cams, the movements of the two sleeves are independent of one another.

The sliding movements of sleeves 66 and 61 are utilized to straighten and ex toggle-links 63 and 64. Sleeve 66 is provided with two links 63 pivoted at 84, each of which links is pivotally connected at the pivotal joint, 65, between toggle-links 63 and 64 of a rst-operation seaming-roller carrier. Similarly, sleeve 61 is provided with two links pivoted at 86, each of which links is pivotally connected at the pivotal joint, 65,'between toggle-links 63 and 64 of a second-Operation seaming-roller carrier.

It will now be understood that, when sleeve 66 is moved downward (as in Fig. 8), the togglelinks of the first-operation seaming-roller car.. riers will be straightened, thereby causing iirstoperation seaming rollers to engage the work piece, and that, when said sleeve 66 moves upward, said toggle-links will be flexed and the first-operation seaming rollers will recede from the work-piece. Likewise, when sleeve 61 descends (as in Fig. 12), the toggle-links of the second-operation seaming-roller carriers will be straightened, thereby causing second-operation seaming rollers to engage the work-piece, and that, when said sleeve 61 moves upward, said toggle-links will be iiexed and the second-operation seaming rollers will recede from the workpiece.

In order to permit the second-operation seaming rollers to pass over a high spot on the workpiece, bearings 6| are made slightly yielding by having their brackets 81 mounted on posts 88, openings 89, through which posts 88 pass, being slightly larger (Fig. 14) than the diameter of said posts. Springs 96 surround pins 9|, carried by brackets B1, and interposed between stationary bearing members 92, on the seamer head, and bolts 93 on pins 9|.

I claim:

In a seaming mechanism having a seamingroller carrier that has a straight-line movement toward and away from the work-piece to be acted i' upon, and having power-actuated operating means to effect such movement: a supportingmember constructed and arranged to rigidly support a seamer head extending at right angles to said supporting-member, and to support a sleeve -slidable lengthwise of said supporting-member;

a seamer head, rigidly carried by said supportingmember and extending at right angles thereto, said seamer head having a radial guideway to slidably receive a seaming-roller carrier, and constructed and arrange-d to be connected to said searning-roller carrier by means of toggle-links; a seaming-roller carrier, having provision to support a, seaming roller, constructed and arranged to slide in the radial guideway of said seamer head and to -be connected to said seamer head by means of toggle-links; a. seaming roller supported by said seaming-roller carrier to follow the radial sliding movement of the latter in a, straight line toward and away from the work-piece to be acted upon; means to eiect radial movements of said seaming-roller carrier, toward and away from the work-piece to be acted upon, in response to the action of the power-actuated operating means and to protect said power-actuated operating means against excessive strain during that movement of said seaming-roller carrier which brings said seaming roller into engagement with the work-piece being acted upon, including: two toggle-links constructed an-d arranged to extend radially of said seamer head and to be completely straightened in moving said seaming-roller carrier toward thev work-piece, one of said togglelinks having a pivotal support on said seamer head and the other of said toggle-links having ing means; power-actuated operating means constructed and arranged to impart a sliding movement to said sleeve of such predetermined ampli- Vtude as to flex said toggles when said seamingroller carrier is moving'away from the workpiece, and to completely straighten said toggles when said seaming-roller carrier is moved toward the work-piece, said power-actuated operating ,Y means including a grooved collar, connected to slide with said sleeve, and a pivotally supported .oscillatory actuating lever having means to engage said grooved collar to eiect sliding movement thereof and of said sleeve; and a connecting means between said sleeve and said togglelinks to transmit the sliding movement of said collar and sleeve to ex said toggles when said seaming-roller carrier is moving away from the work-piece, an-d to completely straighten said toggles when said seaming-roller carrier is moved toward the Work-piece.

' WILLY DIEZEL. 

